Using tools like RemoveWAT 2.2.6 is generally discouraged by security experts due to several factors: Malware Exposure
If your goal is to remove the "Activate Windows" watermark or resolve activation errors without using third-party tools, you can use these official or CMD-based methods: Using a Product Key
If you're using an older build or preview version of Windows 8.1 and are encountering issues, it might be time to consider moving to a newer operating system or version, as preview versions are inherently temporary and meant for testing. Always opt for legitimate methods to activate Windows or manage system updates.
These tools modify core system files (WAT stands for Windows Activation Technologies). This can lead to "Blue Screen of Death" errors or broken system updates.